Ran poetry lock to update lock files with new dependency versions:
- pytest: 8.2.0 → 8.3.0 (fixes tmpdir handling vulnerability)
- python-multipart: updated to latest version (fixes DoS vulnerability)
This resolves the final 2 moderate vulnerabilities in poetry.lock files.
- Change file mode from 644 to 755 for all project files
- Add chain_id parameter to get_balance RPC endpoint with default "ait-devnet"
- Rename Miner.extra_meta_data to extra_metadata for consistency
